.exo {
    width: 1000px;
    height: ;
    margin: 0 auto;
}

* {
    margin: 0;
    padding: 0;
}

header {
    padding-left: 50px;
    padding-top: 100px;
    background-color: mediumpurple;
}

header a {
    display: block;
    width: 120px;
    height: 30px;
    background-color: black;
    color: gainsboro;
    line-height: 30px;
    text-decoration: none;
    border-radius: 6px;
    text-align: center;
}

.lay {
    margin-top: 50px;
    padding-bottom: 30px;
}

section {
    margin-left: 20px;
    padding-top: 30px;
    vertical-align: top;
}

.one {
    width: 300px;
    float: left;
    margin-left: 50px;
}

.yi {
    padding-top: 30px;
}

.xing {
    padding-top: 30px;
}

.haha {
    padding-top: 30px;
}

.yiyi {
    padding-top: 30px;
}

.two {
    width: 260px;
    float: left;
    margin-left: 200px;
}